NLRB's Employer/Union Rights and Obligations

"The National Labor Relations Act forbids employers from interfering with, restraining, or coercing employees in the exercise of rights relating to organizing, forming, joining or assisting a labor organization for collective bargaining purposes, or from working together to improve terms and conditions of employment, or refraining from any such activity. Similarly, labor organizations may not restrain or coerce employees in the exercise of these rights."